六遥词汇笔记单选题词汇解析05　　49.
Whether you live to eat or eat to live, food is a major _______ in every familys budget.
　　A.
nutrition 　　B.
expenditure 花费 费用 　　C.
routine 例行公事 常规 　　D.
provision 供应量 　　50.
Now a paper in Science argues that organic chemicals in the rock come mostly from __________ on earth rather than bacteria on Mars 　　A.
configuration 结构 分布形状 　　B.
constitution 宪法 事物的一般结构 　　C.
condemnation 批评 责难 　　D.
contamination 化学污染 放射遥污染 　　51.
There is much I enjoy about the changing seasons, but my favorite time is the ________ from fall to winter.
　　A.
transmission 　　B.
transformation 转变 　　C.
transition 　　D.
transfer